{"id":530421,"date":"2026-07-17T09:50:33","date_gmt":"2026-07-17T13:50:33","guid":{"rendered":"https:\/\/www.fs1inc.com\/blog\/?p=530421"},"modified":"2026-07-19T11:49:08","modified_gmt":"2026-07-19T15:49:08","slug":"2013-gmc-sierra-pcm-replacement-guide","status":"publish","type":"post","link":"https:\/\/www.fs1inc.com\/blog\/2013-gmc-sierra-pcm-replacement-guide\/","title":{"rendered":"2013 GMC Sierra Engine Computer (PCM\/ECM) Replacement Guide"},"content":{"rendered":"<div class=\"container\">\n<section class=\"hero\">\n<div class=\"code-badge\">PCM<\/div>\n<h1>2013 GMC Sierra Engine Computer (PCM\/ECM) Replacement Guide<\/h1>\n<p class=\"hero-subtitle\">The powertrain control module (PCM) on your 2013 GMC Sierra with the 4.3L V6 serves as the central computer managing engine and transmission functions. It controls fuel injection, emissions systems, and reads multiple sensor inputs. Failure typically stems from internal electrical component breakdown, voltage spikes from charging system issues, or moisture intrusion.<\/p>\n<\/section>\n<div class=\"quick-summary\">\n<h2>Quick Summary<\/h2>\n<ul>\n<li>PCM replacement on a 2013 GMC Sierra requires approximately 1.4 hours of book time for R&amp;R<\/li>\n<li>An additional 0.5 hour is required for post-install relearn procedures<\/li>\n<li>The replacement module must be programmed with vehicle-specific VIN and calibration data<\/li>\n<li>Flagship One units ship VIN-programmed, eliminating dealer programming delays<\/li>\n<li>Module-internal trouble codes P0601-P062F indicate internal PCM faults<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<p>If your 2013 GMC Sierra is experiencing starting issues, stalling, or unexpected transmission behavior, the powertrain control module could be the culprit. The PCM serves as the brain of your vehicle&#8217;s engine and transmission systems, and when it fails, it can leave you stranded or cause drivability problems. This guide walks you through what replacement involves, the programming requirements after installation, and what symptoms to watch for. Whether you&#8217;re diagnosing a no-start condition or planning a preventive replacement, understanding the process helps you make informed decisions about your Sierra&#8217;s repair.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What the PCM Does in a 2013 GMC Sierra<\/h2>\n<p>The powertrain control module on your 2013 GMC Sierra 4.3L is the primary computer responsible for managing engine and transmission operation. It processes inputs from dozens of sensors throughout the powertrain and adjusts fuel delivery, ignition timing, and transmission shift points in real time. This module integrates functions that some vehicles split between separate ECM and TCM units, making it particularly critical for driveability. When the internal memory or processing circuits degrade, the module may store <a href=\"https:\/\/www.fs1inc.com\/gm\/gmc-pcm-ecm-ecu-engine-computer\/sierra-c-k-series-engine-computers.html\">replacement engine computers for the Sierra<\/a> and exhibit intermittent or complete failure. Given the integrated nature of its functions, a faulty PCM can affect everything from cold starts to highway shifting, often with little warning beyond occasional drivability hiccups before total failure.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>What Replacing the PCM Involves<\/h2>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/blog\/wp-content\/uploads\/2026\/07\/2013-gmc-sierra-pcm-location-diagram.webp\" alt=\"2013 GMC Sierra PCM location diagram\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">PCM mounting location on the 2013 GMC Sierra.<\/figcaption><\/figure>\n<div style=\"background:#f7f9fc;border:1px solid #e2e8f2;border-radius:10px;padding:18px 24px;margin:18px 0\">\n<h3 style='margin-top:0'>How to Reach the PCM on the 2013 GMC Sierra<\/h3>\n<ol style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\"><b>Release<\/b> the tab on the rear of the cover while rotating the cover upward.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Remove<\/b> any debris from around the control module connector.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Disconnect<\/b> the engine control module harness connectors.<\/li>\n<li style=\"margin:10px 0;line-height:1.65\"><b>Release<\/b> the three tabs retaining the engine control module to the module bracket.<\/li>\n<\/ol>\n<p style='margin:10px 0 0 0'><em>Work with the ignition off, and treat the module as static-sensitive: avoid touching the connector pins at any point.<\/em><\/p>\n<\/div>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Operation<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Configuration<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Book Time<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.4 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 2500 HD<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.4 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module R&amp;R<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 3500 HD<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">1.4 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 2500 HD<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Powertrain Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 3500 HD<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 1500<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Engine Control Module Relearn<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Sierra 2500 HD<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">0.5 hr<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Programming Requirements After Replacement<\/h2>\n<p>After replacing the PCM on your 2013 GMC Sierra, the factory procedure requires reprogramming the engine control module with vehicle-specific calibration data. Additionally, the turbocharger relearn procedure must be completed, and the glow plug control module requires reprogramming. These steps ensure the new module communicates properly with all vehicle systems and establishes correct idle and driveability settings. Flagship One replacement units arrive <a href=\"https:\/\/www.fs1inc.com\/2013-gmc-sierra-1500-4-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\">a VIN-programmed replacement unit<\/a> that is pre-loaded with your specific vehicle&#8217;s information, meaning the critical programming steps are already completed before the module arrives. Your installer will still need to perform the relearn procedure to finalize adaptation between the new module and your Sierra&#8217;s engine management system.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Symptoms of a Failing PCM<\/h2>\n<p>When the PCM fails on a 2013 GMC Sierra, you may experience a no-start condition where the engine cranks but won&#8217;t fire, or the vehicle may start and then stall unexpectedly. Misfire codes across multiple cylinders often appear, and you may notice rough idle or hesitation under acceleration. In some cases, the scan tool cannot communicate with the module at all, or transmission gear selection becomes erratic. The module may store <a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\">internal memory check sum<\/a> errors indicating internal faults. These symptoms often appear suddenly after periods of occasional drivability complaints, as the internal components degrade over time. Any combination of these issues on your Sierra warrants diagnostic testing of the powertrain control module before pursuing other repairs.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Module Trouble Codes on the 2013 GMC Sierra<\/h2>\n<p>The 2013 GMC Sierra with 4.3L engine may store module-internal trouble codes when the PCM experiences internal failures. These codes, ranging from P0601 through P062F, indicate various internal integrity issues such as checksum errors, calibration memory problems, or processor faults. Unlike conventional sensor or circuit codes, these point directly to the control module itself requiring attention or replacement.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Code<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Meaning<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Full Guide<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0601<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal memory checksum error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0601-internal-control-module-memory-checksum-error\/\" style=\"color:#0563C1\"><b><u>Full P0601 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0602<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Control module programming error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0602-control-module-programming-error\/\" style=\"color:#0563C1\"><b><u>Full P0602 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0603<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Keep-alive memory (KAM) error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0603-internal-control-module-keep-alive-memory-kam-error\/\" style=\"color:#0563C1\"><b><u>Full P0603 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0604<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal RAM error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0604-internal-control-module-random-access-memory-ram-error\/\" style=\"color:#0563C1\"><b><u>Full P0604 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P0606<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Module processor failure<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p0606-control-module-processor\/\" style=\"color:#0563C1\"><b><u>Full P0606 guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>P060B<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Module-internal fault<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#0563C1;text-decoration:none;display:block;cursor:pointer\"><b>P062F<\/b><\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#1a2b49;text-decoration:none;display:block;cursor:pointer\">Internal EEPROM error<\/a><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><a href=\"https:\/\/www.fs1inc.com\/blog\/dtc-p062f-internal-control-module-eeprom-error\/\" style=\"color:#0563C1\"><b><u>Full P062F guide &rarr;<\/u><\/b><\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Factory Service Bulletins Worth Knowing<\/h2>\n<table style=\"width:100%;border-collapse:collapse;margin:18px 0;font-size:15px\">\n<tr>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Bulletin<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">Subject<\/th>\n<th style=\"border:1px solid #d6dbe3;background:#f2f5f9;padding:9px 12px;text-align:left\">What It Addresses<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\"><b>08-06-04-006<\/b><\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">Information for Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in Duram<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">2012 and 2013 6.6L Duramax Engine Control Module Parts Restriction &#8211; (Jul 12, 2013)<\/td>\n<td style=\"border:1px solid #d6dbe3;padding:9px 12px\">&mdash;<\/td>\n<\/tr>\n<\/table>\n<\/div>\n<div class=\"info-section\">\n<h2>Protecting the PCM in Your 2013 GMC Sierra<\/h2>\n<ul style=\"margin:14px 0 6px 0;padding-left:26px\">\n<li style=\"margin:10px 0;line-height:1.65\">Maintain healthy charging system: weak battery or failing alternator can cause voltage fluctuations that stress the PCM<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Keep electrical connections clean: inspect module connectors periodically for corrosion or moisture intrusion<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Avoid jump-starting from poor ground: connect jumper cables properly to prevent voltage spikes<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Address check engine lights promptly: early diagnosis can prevent cascade failures<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Protect connector seals: ensure engine compartment connectors remain sealed from moisture and debris<\/li>\n<li style=\"margin:10px 0;line-height:1.65\">Use quality replacement parts: when diagnosing sensor issues, avoid cheap components that may send incorrect signals<\/li>\n<\/ul>\n<\/div>\n<div class=\"info-section\">\n<h2>Frequently Asked Questions<\/h2>\n<h3>How much does PCM replacement cost on a 2013 GMC Sierra?<\/h3>\n<p>The PCM itself represents a significant investment whether choosing new, refurbished, or used. The labor for replacement and relearn is straightforward at approximately 2 hours total book time. A VIN-programmed replacement from Flagship One arrives ready to install, potentially saving you dealer programming fees.<\/p>\n<h3>Do I need to reprogram a used PCM for my 2013 GMC Sierra?<\/h3>\n<p>Yes. Any replacement PCM must be programmed with your Sierra&#8217;s specific VIN and calibration data to function properly. Flagship One units include this programming at no additional charge, so you receive a plug-and-play replacement ready for installation.<\/p>\n<h3>What happens if I don&#8217;t program the new PCM on my Sierra?<\/h3>\n<p>An unprogrammed PCM will not communicate with your vehicle&#8217;s other modules. The engine may not start, or the transmission may default to limp mode. Programming is mandatory for the module to operate with your Sierra&#8217;s specific engine management system.<\/p>\n<\/div>\n<div class=\"info-section\">\n<p>When your 2013 GMC Sierra needs a new powertrain control module, you have two primary paths: repair the existing unit or replace it with a programmed counterpart. Repair options exist but often come with limited warranties and no guarantee of long-term reliability. A replacement engine computer from Flagship One arrives VIN-programmed to your Sierra, meaning the critical programming steps are handled before the unit reaches your shop. This eliminates the need for dealer appointments or aftermarket programming tools, getting your vehicle back on the road faster.<\/p>\n<figure style=\"margin:22px auto;text-align:center;max-width:720px\"><img decoding=\"async\" style=\"max-width:100%;height:auto;border:1px solid #e2e6ec;border-radius:8px\" src=\"https:\/\/www.fs1inc.com\/media\/wysiwyg\/googleshop\/gmtypeE37\/gm-pcm-typeE37-1.jpg\" alt=\"Refurbished VIN-programmed PCM for the 2013 GMC Sierra\" loading=\"lazy\"\/><figcaption style=\"font-size:13px;color:#667085;margin-top:8px\">A refurbished, VIN-programmed replacement PCM for the 2013 GMC Sierra from Flagship One.<\/figcaption><\/figure>\n<p>Flagship One stocks a <a href=\"https:\/\/www.fs1inc.com\/2013-gmc-sierra-1500-4-3l-pcm-engine-computer-ecm-ecu-programmed-plug-play.html\"><b>refurbished, VIN-programmed PCM for the 2013 GMC Sierra<\/b><\/a> with a lifetime warranty, free shipping and no core charge. The full <a href=\"https:\/\/www.fs1inc.com\/gm\/gmc-pcm-ecm-ecu-engine-computer\/sierra-c-k-series-engine-computers.html\">GMC Sierra module lineup<\/a> covers other engine configurations as well.<\/p>\n<\/div>\n<div class=\"info-section\">\n<h2>Final Thoughts<\/h2>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>2013 GMC Sierra PCM\/ECM failure symptoms include no-start and stalling. This guide covers replacement labor times, programming requirements, and post-install relearn procedures.<\/p>\n","protected":false},"author":1,"featured_media":520369,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[258,270],"tags":[307,68,1307],"class_list":["post-530421","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-car","category-gmc","tag-307","tag-gmc","tag-sierra"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2013 GMC Sierra Engine Computer (PCM\/ECM) Replacement Guide - Flagship One Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fs1inc.com\/blog\/2013-gmc-sierra-pcm-replacement-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2013 GMC Sierra Engine Computer (PCM\/ECM) Replacement Guide - Flagship One Blog\" \/>\n<meta property=\"og:description\" content=\"2013 GMC Sierra PCM\/ECM failure symptoms include no-start and stalling. 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